Improvement in machines for milling carriage-spring heads



` l'o all whom 'it may conocia.`

`Be it knownthatlfI,`WILLIAM Evans, of New {Haven, in the county of Newl-iaven and State of raceteam' @me `nente.

ly'rrLLLiar:evans or' NEW HAVEN, coNNEc'rroU'r.

" f *fteaearaant N6,- 108,013, ama october 4, 1870; i

` "rwiPRoi/EMENT?V INM'ACHINgs FonMlLLlNe cARRlAeE-SPRING HEADS.

. L-@4W- y Schedule reenfedto in these Letters Patent and making 'part of the same.

Connecticut, `have `invented a new Improvement iu Machine for Finishing Carriage-Spring Heads; audl i do herebydecl'are" thefollowing, when taken in con` ncction `w'vitht'he accompanying drawings and the letters of reference marked thereon,"to be a full`,"clear,

` and; exact description' of `the same, and whichf said drawings constitute part of this speciiication, and represent in- I i Y Figure), afrontview;

Y Figure 2, atop view; 1 i

Figure 3, thespring-head unfinished; and iu Figure 4, the` spring-head nished. Thisinventou relates toan improvementin machine for performing that part ot' the work on carriage# springs'kuow as finishing the heads; that is to say,

theears when welded onto the spring to form the h'ead.

f are left as seen iu iig. 3, forming a square shoulder at theirfintersection with the' spring. .[fhis requires to be cut away, as seenl in fig. el. `ILIeretofore it has'been done bychipping.and filing.

" heobject of .my invention is to perform the labor y in a more simple, cheap, audrperfect manner; and i 'lheiuvention consists in a clamping device for hold-4 ing the spring inposition, combined with a rot-ary V cutter or cutters, to be brought in Acontact withl that :portion of t-he head or earSftbe cut away.

u `A isthebed ot' the machine, upon which are supported two jaws, a, operated by a rightand-lefthand threaded screw, ,s'orthat the jaws separatem' ap preach cach other from or toward a common center,

so that the spring B is clamped and held in a vertical r positionbetween the two jaws, as seen in the drawings'.

fO'O are two cutters, caused to revolve by the application of power to the driving-shaft D, as seen iu 'h 2. glhe shafts E of thel two cutters arerarran'ged iu bearings on'the slide F, which said slides are movedr y Atransversely to the axis of the shafts E by a rightaud-left-hand threaded screw, G, as seen in iig. 2, so y as to accommodate the cutters to dierent widths of Y. sp1-ing, and, at `the same time, to feed the cutters up to cutawa'y the head. The spring being'set between thejaws, as seen in fig. 1, the cutters are brought up when revolving, and so as to cutaway the head, tnishing the head, as seen in g. 4.

I claim as my invention- The combiuation'of the two jaws, a a, and right-and-- left screw d, with the two cutters C C and the adjusting-screw G, the whole constructed and arranged in the manner herein set forth.

WILLIAM EVANS.

' Witnesses: H

A. J. Trltrs, JOHNH. SHUMWAY. 

